JP5746960B2 - Infrared heating device - Google Patents
Infrared heating device Download PDFInfo
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- JP5746960B2 JP5746960B2 JP2011275128A JP2011275128A JP5746960B2 JP 5746960 B2 JP5746960 B2 JP 5746960B2 JP 2011275128 A JP2011275128 A JP 2011275128A JP 2011275128 A JP2011275128 A JP 2011275128A JP 5746960 B2 JP5746960 B2 JP 5746960B2
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/673—Quenching devices for die quenching
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
- C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/54—Controlling or regulating the coating process
- C23C14/541—Heating or cooling of the substrates
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/46—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for heating the substrate
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/48—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating by irradiation, e.g. photolysis, radiolysis, particle radiation
- C23C16/482—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating by irradiation, e.g. photolysis, radiolysis, particle radiation using incoherent light, UV to IR, e.g. lamps
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/0033—Heating devices using lamps
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2221/00—Treating localised areas of an article
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/032—Heaters specially adapted for heating by radiation heating
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Resistance Heating (AREA)
- Heat Treatment Of Articles (AREA)
- Control Of Resistance Heating (AREA)
Description
本発明は赤外線加熱装置に係り、特に、赤外線の透過を制限する遮蔽部材を用いて加熱領域を設定する赤外線加熱装置の改良に関するものである。 The present invention relates to an infrared heating device, and more particularly to an improvement of an infrared heating device that sets a heating region using a shielding member that limits transmission of infrared rays.
赤外線源から被加熱部材に赤外線を照射して加熱するとともに、赤外線の透過を制限する遮蔽部材を用いてその被加熱部材の加熱領域を設定する赤外線加熱装置が知られている。特許文献1に記載の装置はその一例で、例えばプレス成形と同時に焼入れを行う熱間プレス成形の際の鋼板の部分加熱に用いられる。すなわち、赤外線の照射部位は例えばAc3点温度以上まで加熱され、プレスにより焼入れ硬化される一方、遮蔽部分はAc3点温度未満の低温度で、焼入れ硬化されずに低強度に維持される。これにより、例えば低強度領域では熱間プレス成形後においても曲げや絞り、穴抜き等の加工を適切に行うことができる。また、車両構造物の場合、高強度領域と低強度領域とを適当に設定することにより、所定の衝突エネルギー吸収性能を確保したり、車両衝突時の変形態様(変形方向など)を調整したりすることができる。 There is known an infrared heating apparatus that heats a heated member by irradiating the heated member from an infrared source and sets a heating region of the heated member using a shielding member that restricts transmission of infrared rays. The apparatus described in Patent Document 1 is an example, and is used, for example, for partial heating of a steel sheet during hot press forming in which quenching is performed simultaneously with press forming. That is, the infrared irradiation site is heated to, for example, an Ac3 point temperature or higher and is hardened and hardened by a press, while the shielding portion is maintained at a low strength without being hardened by a low temperature lower than the Ac3 point temperature. Thereby, for example, in a low-strength region, processing such as bending, drawing and punching can be appropriately performed even after hot press forming. In the case of a vehicle structure, by appropriately setting a high-strength region and a low-strength region, a predetermined collision energy absorption performance can be secured, or a deformation mode (deformation direction, etc.) at the time of a vehicle collision can be adjusted. can do.
しかしながら、遮蔽部材を被加熱部材の上に直接載置して赤外線を照射すると、被加熱部材からの直接の熱伝導により遮蔽部材も加熱されるため、遮蔽部材が早期に劣化し、短期間で交換する必要がある。遮蔽部材を被加熱部材から離して非接触で配置すれば熱伝導の加熱による早期劣化が防止されるが、その遮蔽部材を保持する保持具の存在で、例えば被加熱部材の中央部分のみを島状に低温領域とすることができないなど加熱領域の形状設定の自由度が損なわれるとともに、遮蔽部材を片持ち状に支持する場合、撓み変形を防止するために所定の剛性を確保する必要があり、遮蔽部材の板厚が大きくなってコストアップに繋がる。 However, when the shielding member is placed directly on the heated member and irradiated with infrared rays, the shielding member is also heated by direct heat conduction from the heated member, so that the shielding member deteriorates early and in a short period of time. It needs to be replaced. If the shielding member is arranged away from the heated member in a non-contact manner, premature deterioration due to heat conduction is prevented, but due to the presence of a holder that holds the shielding member, for example, only the central portion of the heated member is isolated from the island. When the shielding member is supported in a cantilevered manner, it is necessary to ensure a predetermined rigidity to prevent bending deformation. The plate thickness of the shielding member is increased, leading to an increase in cost.
本発明は以上の事情を背景として為されたもので、その目的とするところは、遮蔽部材の加熱を防止するために被加熱部材から離して非接触で配置する場合に、島状の低温領域を設定できるなど加熱領域の形状設定の自由度が高いとともに、遮蔽部材の剛性を確保する必要がない赤外線加熱装置を提供することにある。 The present invention has been made against the background of the above circumstances, and its object is to provide an island-like low-temperature region in the case of non-contact arrangement away from the heated member in order to prevent heating of the shielding member. It is an object of the present invention to provide an infrared heating device that has a high degree of freedom in setting the shape of the heating region and that does not need to ensure the rigidity of the shielding member.
かかる目的を達成するために、第1発明は、赤外線源から被加熱部材に赤外線を照射して加熱するとともに、赤外線の透過を制限する遮蔽部材を用いてその被加熱部材の加熱領域を設定する赤外線加熱装置において、(a) 前記被加熱部材としてプレス成形と同時に焼入れが行われる熱間プレス用鋼板を部分加熱するためのもので、(b) 前記赤外線源と前記被加熱部材との間に、赤外線を透過させる一対の板状の保持部材がその赤外線の照射方向に対して交差する姿勢で配置され、その一対の保持部材の間に前記遮蔽部材が挟まれて保持されているとともに、(c) 前記遮蔽部材は、前記赤外線の透過を制限する所定形状の金属箔または金属膜で、前記一対の保持部材の間に部分的に配置された島状の遮蔽部材を有する一方、(d) 前記一対の保持部材は板状の耐熱ガラスで、前記遮蔽部材を挟んだ状態でその遮蔽部材以外の部分が互いに密着するように重ね合わされて使用されることを特徴とする。 In order to achieve such an object, according to the first aspect of the present invention, the heated member is irradiated with infrared rays to heat the heated member, and a heating region of the heated member is set using a shielding member that restricts infrared transmission. In an infrared heating device, (a) for partially heating a hot-press steel plate that is quenched simultaneously with press forming as the member to be heated, and (b) between the infrared source and the member to be heated. , they are arranged in a posture in which a pair of plate-shaped holding member that transmits infrared rays intersects the irradiation direction of the infrared, with being held the shield member is sandwiched in between the pair of holding members, ( c) The shielding member is a metal foil or metal film having a predetermined shape that restricts transmission of the infrared rays, and has an island-shaped shielding member partially disposed between the pair of holding members, (d) The pair of holding members is In Jo of heat-resistant glass, characterized in that the portion other than the shielding member in the state sandwiching the shielding member is used are superposed in close contact with each other.
第2発明は、第1発明の赤外線加熱装置において、前記遮蔽部材は、前記一対の耐熱ガラスの中、前記被加熱部材と反対側に位置する耐熱ガラスのその被加熱部材側の面に蒸着された金属膜であることを特徴とする。 The second invention is the infrared heating apparatus of the first invention, wherein the shield member is in said pair of heat-resistant glass, before SL deposited on the surface of the member to be heated side of the heat-resistant glass which is located on the opposite side of the member to be heated It is characterized by being a metal film.
このような赤外線加熱装置においては、赤外線源と被加熱部材との間に赤外線を透過させる保持部材が配置され、その保持部材によって遮蔽部材が保持されているため、遮蔽部材を被加熱部材から離して非接触で配置することが可能で、被加熱部材の加熱に伴う遮蔽部材の加熱が抑制されて早期劣化が防止される。また、被加熱部材の中央部分のみを遮蔽して島状に低温領域とすることができるなど、加熱領域の形状設定の自由度が高くなるとともに、遮蔽部材を片持ち状に支持する必要がないため、剛性を確保するために遮蔽部材の板厚を大きくする必要がなく、安価に構成できる。 In such an infrared heating device, a holding member that transmits infrared rays is disposed between the infrared source and the heated member, and the shielding member is held by the holding member, so that the shielding member is separated from the heated member. The contact member can be disposed in a non-contact manner, and the heating of the shielding member accompanying the heating of the heated member is suppressed, so that early deterioration is prevented. Further, only the central part of the heated member can be shielded to form an island-like low temperature region, and the degree of freedom in setting the shape of the heating region is increased, and it is not necessary to support the shielding member in a cantilevered manner. Therefore, it is not necessary to increase the plate thickness of the shielding member in order to ensure rigidity, and it can be configured at low cost.
また、保持部材が一対の板状の耐熱ガラスを重ね合わせたもので、その一対の耐熱ガラスの間に保持された金属箔または金属膜によって遮蔽部材が構成されており、耐熱ガラスによってその遮蔽部材を挟んだ状態で遮蔽部材以外の部分が互いに密着するように重ね合わされて使用されるため、熱や蒸気等の影響を受けて遮蔽部材が汚れたり変形したりする恐れがなく、遮蔽部材の耐久性が向上するとともに、必要に応じて耐熱ガラスを洗浄するだけで良いためメンテナンスが容易である。また、遮蔽部材が尖っていたり細い形状であったりしても、熱や雰囲気の影響で変形する恐れが無いとともに、赤外線の透過を制限できる範囲で薄くできるため、遮蔽部材の使用量が節減されてコストダウンを図ることができる。 Also, those retaining member is superimposed a pair of plate-like heat-resistant glass, is constituted shielding member by a metal foil or a metal film held between the pair of heat-resistant glass, its by heat-resistant glass Since the parts other than the shielding member are overlapped and used in a state where the shielding member is sandwiched , the shielding member is not affected by heat, steam, etc., and the shielding member is not stained or deformed. As well as improving the durability, maintenance is easy because it is only necessary to wash the heat-resistant glass as necessary. In addition, even if the shielding member is sharp or thin, there is no risk of deformation due to the influence of heat or atmosphere, and it can be made thin as long as infrared transmission can be restricted, so the usage of the shielding member is reduced. Cost reduction.
第2発明では、一対の耐熱ガラスの中、被加熱部材と反対側に位置する耐熱ガラスの被加熱部材側の面に蒸着された金属膜によって遮蔽部材が構成されているため、加熱装置に対する被加熱部材の搬入、搬出時に被加熱部材側の耐熱ガラスに当たって疵が付いたとしても、その耐熱ガラスを交換するだけで良く、遮蔽部材はそのまま使用できるため、影響が最小限に抑えられる。また、蒸着により耐熱ガラスに直接設けられた金属膜が遮蔽部材として用いられるため、別体に構成された遮蔽部材を耐熱ガラスに貼り付けたり挟み込んだりする場合に比較して、細かい形状や互いに離間した複数の遮蔽部分を簡単に高い精度で設定でき、加熱領域の形状設定の自由度が更に高くなる。 In the second invention, in the pair of heat-resistant glass, because it is composed shielding member by a metal film deposited on the surface of the heated member side of the heat-resistant glass which is located on the opposite side of the member to be heated, the relative heating device Even if the heating member is carried in and out, even if it hits the heat-resistant glass on the heated member side, it is only necessary to replace the heat-resistant glass, and the shielding member can be used as it is, so that the influence is minimized. In addition, since a metal film directly provided on the heat-resistant glass by vapor deposition is used as a shielding member, it has a finer shape and is separated from each other compared to a case where a separate shielding member is attached to or sandwiched between the heat-resistant glass. The plurality of shielded portions can be easily set with high accuracy, and the degree of freedom in setting the shape of the heating region is further increased.
本発明の赤外線加熱装置は、プレス成形と同時に焼入れを行う熱間プレス成形の際の鋼板の部分加熱に用いられる。すなわち、赤外線の照射部は例えばAc3点温度以上まで加熱され、プレスにより焼入れ硬化される一方、遮蔽部分はAc3点温度未満の低温度で、焼入れ硬化されずに低強度に維持される。これにより、例えば低強度領域では熱間プレス成形後においても曲げや絞り、穴抜き等の加工やスポット溶接等を適切に行うことができる。また、車両構造物の場合、高強度領域と低強度領域とを適当に設定することにより、所定の衝突エネルギー吸収性能を確保したり、車両衝突時の変形態様(変形方向など)を調整したりすることができる。被加熱部材としては、熱間プレス用の鋼板が用いられ、本発明の赤外線加熱装置による部分加熱後に熱間プレス成形されることにより、焼入れ硬化された高強度領域(高温加熱領域)と低強度領域(低温加熱領域)とが所定のパターンで形成される。 Infrared heating apparatus of the present invention is used for partial heating of the steel sheet during hot press forming simultaneously quenching the flop press forming. That is, the infrared irradiation portion is heated to, for example, an Ac3 point temperature or higher and is hardened and hardened by a press, while the shielding portion is maintained at a low strength without being hardened by a low temperature lower than the Ac3 point temperature. Thereby, for example, in a low-strength region, processing such as bending, drawing and punching, spot welding, and the like can be appropriately performed even after hot press forming. In the case of a vehicle structure, by appropriately setting a high-strength region and a low-strength region, a predetermined collision energy absorption performance can be secured, or a deformation mode (deformation direction, etc.) at the time of a vehicle collision can be adjusted. can do. The heated member, use steel sheet for hot press Irare, by being hot press forming after partial heating with infrared heating apparatus of the present invention, the high strength region is quench hardened with (high-temperature heating region) Low A strength region (low temperature heating region) is formed in a predetermined pattern.
赤外線源は赤外線を照射する装置で、赤外線ランプヒーターが好適に用いられる。赤外線としては、波長が短い近赤外線を用いる方が効率良く加熱できる。遮蔽部材は、赤外線を反射したり吸収したりして赤外線の透過量を少なくするものであれば良いが、自身の加熱による劣化を抑制する上で反射率の高いものが望ましい。例えば酸化し難く赤外線反射率が高い金箔や金の蒸着膜が好適に用いられるが、被加熱部材よりも赤外線を反射する能力が高い銀やアルミニウムなどを用いることもできる。 The infrared source is a device that emits infrared rays, and an infrared lamp heater is preferably used. As infrared rays, it is possible to efficiently heat near infrared rays having a short wavelength. The shielding member may be any member that reflects or absorbs infrared rays to reduce the amount of infrared rays transmitted, but a high reflectance is desirable in order to suppress deterioration due to its own heating. For example deposited film of oxide hardly gold and gold infrared reflectance have high is preferably used, but it is also possible to have use of the etc. capacity is higher silver or aluminum for reflecting infrared than heated member.
赤外線を透過させる保持部材としては、石英ガラスや硼珪酸ガラス等の耐熱ガラスが用いられる。赤外線の透過率が高いもの(例えば近赤外線の透過率が80%以上が望ましい)であれば良く、必ずしも赤外線を100%透過させるものである必要はない。 The holding member that transmits infrared radiation, which need use the heat-resistant glass such as quartz glass or borosilicate glass. If those infrared transmittance is high (e.g., near-infrared transmittance is desirable not less than 80%) may, need not name is necessarily that transmits infrared of 100%.
以下、本発明の実施例を、図面を参照しつつ詳細に説明する。
図1は、本発明の一実施例である赤外線加熱装置10の概略構成を説明する正面図で、赤外線源として略水平に配置された複数の近赤外線ランプヒーター12を備えている。この近赤外線ランプヒーター12の真下には、図示しないローダ装置(コンベアなど)により被加熱部材14が搬入される。被加熱部材14は平坦な熱間プレス用鋼板で、略水平となる姿勢で支持され、近赤外線ランプヒータ12から真下に出射された近赤外線(矢印L)が略垂直に照射されることによって加熱される。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front view illustrating a schematic configuration of an
上記近赤外線ランプヒーター12と被加熱部材14との間の中間位置には保持部材16が配置され、近赤外線Lの透過を制限する所定形状の遮蔽部材18が保持されている。保持部材16は、近赤外線Lを透過させる一対の平坦な上部石英ガラス板20および下部石英ガラス板22を備えており、略水平となる姿勢、すなわち近赤外線ランプヒーター12から出射される近赤外線Lに対して略垂直となる姿勢で互いに重ね合わされるように配置されているとともに、近赤外線Lの照射範囲外に位置する周縁部において複数のステー(支持具)24により被加熱部材14から上方へ離間した位置で支持されている。石英ガラス板20、22は耐熱ガラスに相当する。
A
遮蔽部材18は、酸化し難く且つ近赤外線Lの反射率が高い金箔(厚さ約1μm)にて構成されており、図5に示すように一対の上部石英ガラス板20と下部石英ガラス板22との間に挟まれて保持されるようになっている。図1では、遮蔽部材18を示すために石英ガラス板20、22の間に隙間があるが、遮蔽部材18は1μm程度と極めて薄いため、実際には一対の石英ガラス板20、22は互いに略密着するように重ね合わされている。このような遮蔽部材18が配置された部分では、近赤外線Lの透過が遮断されるため、被加熱部材14には近赤外線Lの影が生じて加熱が制限され、近赤外線Lが照射される高温加熱領域Hiおよび影の部分の低温加熱領域Loが、遮蔽部材18の形状に対応する所定のパターンで形成される。
The
図2は、遮蔽部材18の一例を具体的に示す斜視図で、島状の遮蔽部材18b、18cを含めて計3つの遮蔽部材18a〜18cにて構成されている。図3は、図2の遮蔽部材18によって被加熱部材14に形成される高温加熱領域Hiおよび低温加熱領域Loの一例である。高温加熱領域HiはAc3点温度以上まで加熱される一方、低温加熱領域LoはAc3点温度未満の低温度であり、このように赤外線加熱装置10により部分加熱された被加熱部材14は、続いて熱間プレス成形されることにより、高温加熱領域Hiは焼入れ硬化されて高強度とされる一方、低温加熱領域Loは焼入れ硬化されることなく低強度に維持される。低強度の部位は、高強度の部位に比較して、容易に切断や穴抜き等の加工を行うことができるとともに、スポット溶接の条件も容易になる。図4は、被加熱部材14が赤外線加熱装置10により部分加熱されて熱間プレス成形された後に、低温加熱領域(低強度部位)Loに穴抜き32およびトリミング34が行われたプレス成形品30の一例である。
FIG. 2 is a perspective view specifically showing an example of the
このように、本実施例の赤外線加熱装置10においては、近赤外線ランプヒーター12と被加熱部材14との間に近赤外線Lを透過させる保持部材16が配置され、その保持部材16によって遮蔽部材18が保持されているため、遮蔽部材18を被加熱部材14から離して非接触で配置することが可能で、被加熱部材14の加熱に伴う遮蔽部材18の加熱が抑制されて早期劣化が防止される。
Thus, in the
また、島状の遮蔽部材18b、18cを用いて島状の低温加熱領域Loを設けることができるなど、高温加熱領域Hiおよび低温加熱領域Loの形状設定の自由度が高くなるとともに、遮蔽部材18を片持ち状に支持する必要がないため、剛性を確保するために遮蔽部材18の板厚を大きくする必要がなく、安価に構成できる。
Moreover, the island-shaped
また、本実施例では、保持部材16が一対の上部石英ガラス板20および下部石英ガラス板22を重ね合わせたもので、その一対の石英ガラス板20および22の間に挟まれて保持された金箔によって遮蔽部材18が構成されているため、熱や蒸気等の影響を受けて遮蔽部材18が汚れたり変形したりする恐れがなく、遮蔽部材18の耐久性が向上するとともに、必要に応じて石英ガラス板20、22の表面を洗浄するだけで良いためメンテナンスが容易である。すなわち、遮蔽部材18が汚れたり粉塵が付着したりすると、汚れが近赤外線Lを吸収して加熱され、早期に劣化する恐れがあるとともに、保持部材16が汚れると被加熱部材14の加熱効率が低下したりするが、遮蔽部材18は一対の石英ガラス板20、22に挟まれて保持されているため汚れる恐れがなく、石英ガラス板20、22に付着した汚れは比較的簡単に除去することが可能で手入れが容易なのである。
Further, in this embodiment, the holding
また、遮蔽部材18の各部材18a〜18cが尖っていたり細い形状であったりしても、熱や雰囲気の影響で変形する恐れが無いとともに、近赤外線Lの透過を制限できる範囲で薄くできるため、遮蔽部材18の使用量すなわち金箔の使用量が節減されてコストダウンを図ることができる。
In addition, even if each
また、遮蔽部材18は一対の石英ガラス板20、22の間に挟まれて保持されているため、赤外線加熱装置10に対する被加熱部材14の搬入、搬出時に被加熱部材側すなわち下側の下部石英ガラス板22に被加熱部材14等が当たって疵が付いたとしても、その下部石英ガラス板22を交換するだけで良く、遮蔽部材18はそのまま使用できるため、影響が最小限に抑えられる。
Further, since the shielding
なお、遮蔽部材18を被加熱部材14に接触させて配置した場合、その接触面は雰囲気(酸素を含む空気)に触れないため、加熱中に被加熱部材14の表面が酸化されることはないが、加熱終了後に遮蔽部材18を取り除く際に高温になった被加熱部材14が雰囲気に触れることにより激しい酸化反応(燃焼)を起こし、被加熱部材14に施された亜鉛やアルミなどのメッキ層が蒸発する恐れがある。本実施例では、遮蔽部材18が保持部材16に保持されて、被加熱部材14から上方へ離間して非接触で配置されているため、このような急激な酸化反応で被加熱部材14のメッキ層が蒸発する恐れもない。
When the shielding
一方、上記実施例では、遮蔽部材18として金箔が用いられ、一対の石英ガラス板20、22の間に挟まれて保持されるようになっていたが、図6に示すように、被加熱部材14と反対側に位置する上部石英ガラス板20の下面、すなわち被加熱部材14側の面に金を蒸着して蒸着膜を形成し、この蒸着膜を遮蔽部材18として用いることもできる。図5および図6は、両者の違いを明らかにするために、一対の石英ガラス板20、22を互いに離間させて示したもので、実際に使用する際には互いに略密着するように重ね合わされて使用される。
On the other hand, in the above embodiment, a gold foil is used as the shielding
図6のように蒸着により上部石英ガラス板20に直接設けられた金の蒸着膜を遮蔽部材18として用いる場合、前記実施例のように別体に構成された金箔を遮蔽部材18として用いて一対の石英ガラス板20、22の間に挟み込む場合に比較して、細かい形状や互いに離間した複数の遮蔽部分を簡単に高い精度で設定でき、高温加熱領域Hiおよび低温加熱領域Loの形状設定の自由度が更に高くなる。
When a gold vapor deposition film directly provided on the upper
以上、本発明の実施例を図面に基づいて詳細に説明したが、これ等はあくまでも一実施形態であり、本発明は当業者の知識に基づいて種々の変更、改良を加えた態様で実施することができる。 As mentioned above, although the Example of this invention was described in detail based on drawing, these are one Embodiment to the last, This invention is implemented in the aspect which added the various change and improvement based on the knowledge of those skilled in the art. be able to.
10:赤外線加熱装置 12:近赤外線ランプヒーター(赤外線源) 14:被加熱部材 16:保持部材 18、18a〜18c:遮蔽部材 20:上部石英ガラス板(耐熱ガラス) 22:下部石英ガラス板(耐熱ガラス) Hi:高温加熱領域 Lo:低温加熱領域
10: Infrared heating device 12: Near infrared lamp heater (infrared source) 14: Heated member 16: Holding
Claims (2)
前記被加熱部材としてプレス成形と同時に焼入れが行われる熱間プレス用鋼板を部分加熱するためのもので、
前記赤外線源と前記被加熱部材との間に、赤外線を透過させる一対の板状の保持部材が該赤外線の照射方向に対して交差する姿勢で配置され、該一対の保持部材の間に前記遮蔽部材が挟まれて保持されているとともに、
前記遮蔽部材は、前記赤外線の透過を制限する所定形状の金属箔または金属膜で、前記一対の保持部材の間に部分的に配置された島状の遮蔽部材を有する一方、
前記一対の保持部材は板状の耐熱ガラスで、前記遮蔽部材を挟んだ状態で該遮蔽部材以外の部分が互いに密着するように重ね合わされて使用される
ことを特徴とする赤外線加熱装置。 In an infrared heating apparatus that irradiates and heats a member to be heated from an infrared source and sets a heating region of the member to be heated using a shielding member that restricts transmission of infrared rays.
For partially heating a hot-press steel plate that is quenched simultaneously with press forming as the member to be heated,
Between the infrared source and the member to be heated, a pair of plate-like holding members that transmit infrared rays are arranged in a posture intersecting the irradiation direction of the infrared rays, and the shielding is provided between the pair of holding members. While the member is sandwiched and held,
The shield member is a metal foil or metal film having a predetermined shape that restricts transmission of the infrared rays, and has an island-shaped shield member partially disposed between the pair of holding members,
The pair of holding members are plate-shaped heat-resistant glass, and are used in such a manner that portions other than the shielding member are in close contact with each other with the shielding member sandwiched therebetween.
ことを特徴とする請求項1に記載の赤外線加熱装置。 The said shielding member is the metal film vapor-deposited on the surface at the side of the said to-be-heated member of the heat-resistant glass located in the opposite side to the said to-be-heated member among a pair of said heat-resistant glass. The infrared heating device described.
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JP2011275128A JP5746960B2 (en) | 2011-12-15 | 2011-12-15 | Infrared heating device |
CN201280060995.XA CN104011228B (en) | 2011-12-15 | 2012-06-25 | Infrared heating device |
PCT/JP2012/066175 WO2013088764A1 (en) | 2011-12-15 | 2012-06-25 | Infrared heating device |
US14/365,741 US20150016810A1 (en) | 2011-12-15 | 2012-06-25 | Infrared heating device |
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WO2013088764A1 (en) | 2013-06-20 |
US20150016810A1 (en) | 2015-01-15 |
CN104011228A (en) | 2014-08-27 |
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